Plants form greyish, rather lax cushions, up to 30cm across. Leaves oblong-elliptic, 4-7.5mm long, covered in short glandular hairs, the margin revolute, indistinctly toothed. Flowers solitary and sessile; corolla pale pinkish-violet to purple, the tube 12-14mm long, the limb 12-16mm diameter with heart-shaped lobes clearly notched at the apex. Only known from the area between the Kuhrang and Bazoft Valleys, Bakhtiari Province, Western Iran, on shaded and semi-shaded limestone cliffs, 2250-4300m. The single clone which persisted from the original JCA3010 introduction was particularly lax but when the SLIZE expedition made further introductions in 1998 it became apparent how variable the species is. Jamzad (1996) described a new species D. bazoftica, said to differ from D. archibaldii in several minor ways but following close examination of the original type specimen Liden reviewed this conclusion, resulting in D. bazoftica being sunk in synonymy. At least two, particularly fine forms, have been given clonal names. Collections in cultivation are JCA3010, SLIZE115, SLIZE116, SLIZE117, SLIZE135, T4Z135, T4Z137, JZZ05-172, JLMS02-87 and KUHI259a-1. There are numerous f1 and f2 hybrids in cultivation.
Reference: ALPINE GARDEN SOCIETY PLANT ENCYCLOPAEDIA